features： I produced the Fe-Cr-Al heating wire has: the high temperature (0Cr27Al7Mo2 and HRE in the atmosphere, the maximum temperature up to 1400 ℃), long life, allowing the surface load, good oxidation resistance, the proportion of small In nickel-chromium alloy, high resistivity, and good resistance to sulfur features, are widely used in electric furnace, furnace heating elements and other products produced and resistance components

Open-type spring wire:

Power（W）

Dia.（mm）

Mandreldiameter(mm)

Cold resistance（Ω）

Weight

(g)

Cable length

（mm）

Spirallength

(mm)

300

0.30

3.0

153.7

3.84

7654

198

400

0.35

3.0

115.2

5.33

7854

232

500

0.40

3.5

92.2

7.28

8159

242

600

0.45

3.5

76.8

9.70

8600

283

800

0.55

4.0

57.6

16.23

9632

360

1000

0.60

4.0

46.1

18.42

9178

370

1200

0.70

4.0

38.4

28.44

10410

455

1500

0.80

4.0

30.7

38.87

10890

663

2000

0.90

4.0

23

46.57

10310

547

2500

1.10

4.5

18.4

83.32

12350

755

3000

1.20

4.5

15.4

98.12

12220

770

4000

1.50

5.0

11.5

179.33

14300

962

Technical parameters of spring wire Table:

Performance\ material

0Cr25A15

0Cr21A16Nb

0Cr27A17Mo2

composition

Cr

23.0-26.0

21.0～23.0

26.5～27.8

AL

4.5～6.5

5.0～7.0

6.0～7.0

Fe

Rest

Rest

Rest

Re

Rest

Rest

Rest

Nb:0.5

Nb:0.5

Max.continuous service

Temp. of element

1250

1350

1400

Melting Point

1500

1510

1520

密度g/cm3

7.10

7.10

7.10

ResistivityμΩ·m，20℃

1.42±0.07

1.45±0.07

1.53±0.07

Tensile strength
Mpa

630～780

650～800

680～830

Elongation at rupture

≥12

≥12

≥10

Repeat Bending Frequency

≥5

≥5

≥5

Fast life h/℃

≥80/1300

≥80/1350

≥80/1350

Specific heatJ/g.℃

0.494

0.494

0.494

Thermal conductivity
KJ/m.h℃

46.1

46.1

45.2

Coefficient of lines expansion
a×10-6/℃（20～1000℃

16.0

16.0

16.0

Hardness HB

200～260

200～260

200～260

Micrographic struction

Ferrite

Ferrite

Ferrite

Magnetic properties

Magnetic

Magnetic

Magnetic

Technical parameters of spring wire Table:

Dia.

Cross Sectional area
(mm2)

Surface per meter
cm2/m

0Cr25A15

0Cr21A16Nb

0Cr27A17Mo2

Weight per meter
kg/m

Resistance per meterΩ/m,20℃

Weight per meter
kg/m

Resistance per meter

Weight per meterΩ/m,20℃

Resistance per meterΩ/m,20℃

0.10

0.007854

3.142

0.00005576

180.8

0.00005576

184.6

0.00005576

194.8

0.12

0.01131

3.770

0.00008030

125.6

0.00008030

128.2

0.00008030

135.3

0.15

0.01767

4.712

0.0001255

80.36

0.0001255

82.05

0.0001255

80.6

0.17

0.02270

5.341

0.0001612

62.56

0.0001612

63.88

0.0001612

67.4

0.19

0.02835

5.969

0.0002013

50.08

0.0002013

51.14

0.0002013

54.0

0.21

0.03464

6.597

0.0002459

41.00

0.0002459

41.86

0.0002459

44.2

0.25

0.04909

7.854

0.0003485

28.93

0.0003485

29.54

0.0003485

31.2

0.27

0.05726

8.482

0.0004065

24.80

0.0004065

25.33

0.0004065

26.7

0.29

0.06605

9.111

0.0004690

21.50

0.0004690

21.95

0.0004690

23.2

0.31

0.07548

9.739

0.0005359

18.81

0.0005359

19.21

0.0005359

20.3

0.35

0.09621

11.00

0.0006830

14.76

0.0006830

15.07

0.0006830

15.9

0.40

0.1257

12.57

0.0008922

11.30

0.0008922

11.54

0.0008922

12.19

0.45

0.1590

14.14

0.001129

8.928

0.001129

9.117

0.001129

9.62

0.50

0.1963

15.71

0.001394

7.232

0.001394

7.385

0.001394

7.79

0.60

0.2827

18.85

0.002007

5.022

0.002007

5.128

0.002007

5.41

0.70

0.3848

21.99

0.002732

3.690

0.002732

3.768

0.002732

3.98

0.80

0.5027

25.13

0.003569

2.825

0.003569

2.885

0.003569

3.04

0.90

0.6362

28.28

0.004517

2.232

0.004517

2.279

0.004517

2.41

1.00

0.7854

31.42

0.005576

1.808

0.005576

1.846

0.005576

1.95

1.20

1.131

37.70

0.008030

1.256

0.008030

1.282

0.008030

1.35

1.40

1.539

43.98

0.01093

0.9224

0.01093

0.9419

0.01093

0.994

1.60

2.011

50.27

0.01428

0.7063

0.01428

0.7212

0.01428

0.761

1.80

2.545

56.55

0.01807

0.5580

0.01807

0.5698

0.01807

0.601

2.00

3.142

62.83

0.02231

0.4520

0.02231

0.4615

0.02231

0.487

2.20

3.801

69.12

0.02699

0.3736

0.02699

0.3814

0.02699

0.402

2.50

4.909

78.54

0.03485

0.2893

0.03485

0.2954

0.03485

0.312

3.00

7.069

94.25

0.05019

0.2009

0.05019

0.2051

0.05019

0.216

3.50

9.621

110.0

0.06831

0.1476

0.06831

0.1507

0.06831

0.159

4.00

12.57

125.7

0.08922

0.1130

0.08922

0.1154

0.08922

0.1218

4.50

15.90

141.1

0.1129

0.08928

0.1129

0.09117

0.1129

0.0962

5.00

19.63

157.1

0.1394

0.07232

0.1394

0.07385

0.1394

0.0779

5.50

23.76

172.8

0.1687

0.05977

0.1687

0.06103

0.1687

0.0644

6.00

28.27

188.5

0.2007

0.05022

0.2007

0.05128

0.2007

0.0541

6.50

33.18

204.2

0.2356

0.04279

0.2356

0.04370

0.2356

0.0461

7.00

38.48

219.9

0.2732

0.03690

0.2732

0.03768

0.2732

0.0398

Notes:1、Heating wire in the design of the power wiring methods shall be based on reasonable surface load, the correct selection of wire diameter.2、Electric wire in response to the furnace before installing a comprehensive inspection, clear ferrite, Results of carbon, in contact with the furnace on the hidden dangers to avoid short circuit, causing furnace to prevent the breakdown of silk.3、Electric wire in the wiring installation methods should be designed properly connected.4、In the use of electric wire temperature control system should be checked before the sensitivity to prevent temperature failure, resulting in burning of electric wire.